PHP get_child_categories函数代码示例

 private function categories2xml($categories)
 {
     foreach ($categories as $category) {
         if (!is_object($category)) {
             echo "not an object\n";
             var_dump($category);
             debug_print_backtrace();
             die;
         }
         $category->categories = get_child_categories($category->id);
         echo "<category oldid='{$category->id}' ";
         $name = str_replace(array("&", "<", ">", '"', "'"), array("&amp;", "&lt;", "&gt;", "&quot;", "&apos;"), $category->name);
         echo "name='{$name}'>";
         foreach ($category->categories as $categories2) {
             $this->categories2xml(array($categories2));
         }
         echo "</category>\n";
     }
 }

/**
 * Category is 0 (for all courses) or an object
 */
function print_courses($category)
{
    global $CFG, $OUTPUT;
    if (!is_object($category) && $category == 0) {
        $categories = get_child_categories(0);
        // Parent = 0   ie top-level categories only
        if (is_array($categories) && count($categories) == 1) {
            $category = array_shift($categories);
            $courses = get_courses_wmanagers($category->id, 'c.sortorder ASC', array('summary', 'summaryformat'));
        } else {
            $courses = get_courses_wmanagers('all', 'c.sortorder ASC', array('summary', 'summaryformat'));
        }
        unset($categories);
    } else {
        $courses = get_courses_wmanagers($category->id, 'c.sortorder ASC', array('summary', 'summaryformat'));
    }
    if ($courses) {
        echo html_writer::start_tag('ul', array('class' => 'unlist'));
        foreach ($courses as $course) {
            $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
            if ($course->visible == 1 || has_capability('moodle/course:viewhiddencourses', $coursecontext)) {
                echo html_writer::start_tag('li');
                print_course($course);
                echo html_writer::end_tag('li');
            }
        }
        echo html_writer::end_tag('ul');
    } else {
        echo $OUTPUT->heading(get_string("nocoursesyet"));
        $context = get_context_instance(CONTEXT_SYSTEM);
        if (has_capability('moodle/course:create', $context)) {
            $options = array();
            if (!empty($category->id)) {
                $options['category'] = $category->id;
            } else {
                $options['category'] = $CFG->defaultrequestcategory;
            }
            echo html_writer::start_tag('div', array('class' => 'addcoursebutton'));
            echo $OUTPUT->single_button(new moodle_url('/course/edit.php', $options), get_string("addnewcourse"));
            echo html_writer::end_tag('div');
        }
    }
}

$tmp_groups = implode(',', $_SESSION['groups']);
$course_id = $_SESSION['course_id'];
$sql = '';
$sqlParams = array();
if (!empty($tmp_groups)) {
    $sql = 'SELECT * FROM %slinks L INNER JOIN %slinks_categories C USING (cat_id) WHERE ((owner_id=%d AND owner_type=%s) OR (owner_id IN (%s) AND owner_type=%s)) AND L.Approved=1';
    array_push($sqlParams, TABLE_PREFIX, TABLE_PREFIX, $course_id, LINK_CAT_COURSE, $tmp_groups, LINK_CAT_GROUP);
} else {
    $sql = 'SELECT * FROM %slinks L INNER JOIN %slinks_categories C USING (cat_id) WHERE (owner_id=%d AND owner_type=%s) AND L.Approved=1';
    array_push($sqlParams, TABLE_PREFIX, TABLE_PREFIX, $course_id, LINK_CAT_COURSE);
}
//view links of a child category
$cat_parent_id = $_GET['cat_parent_id'];
if ($cat_parent_id) {
    $cat_parent_id = intval($cat_parent_id);
    $children = get_child_categories($cat_parent_id, $categories);
    $cat_sql = sprintf(' AND C.cat_id IN (%s %s)', $children, $cat_parent_id);
    $sql .= $cat_sql;
    $parent_id = $cat_parent_id;
} else {
    $parent_id = 0;
}
//search
$search = $_GET['search'];
if ($search) {
    $search = trim($search);
    $page_string .= SEP . 'search=' . urlencode($search);
    $search = str_replace(array('%', '_'), array('', '\\_'), $search);
    $search = '%%' . $search . '%%';
    $search_sql = sprintf(' AND ((LinkName LIKE "%s") OR (description LIKE "%s"))', $search, $search);
    $sql .= $search_sql;

 function definition()
 {
     global $CFG, $DB;
     $mform =& $this->_form;
     $category = $this->_customdata;
     $categorycontext = context_coursecat::instance($category->id);
     $this->_category = $category;
     /// Check permissions, to see if it OK to give the option to delete
     /// the contents, rather than move elsewhere.
     /// Are there any subcategories of this one, can they be deleted?
     $candeletecontent = true;
     $tocheck = get_child_categories($category->id);
     $containscategories = !empty($tocheck);
     $categoryids = array($category->id);
     while (!empty($tocheck)) {
         $checkcat = array_pop($tocheck);
         $childcategoryids[] = $checkcat->id;
         $tocheck = $tocheck + get_child_categories($checkcat->id);
         $chcontext = context_coursecat::instance($checkcat->id);
         if ($candeletecontent && !has_capability('moodle/category:manage', $chcontext)) {
             $candeletecontent = false;
         }
     }
     /// Are there any courses in here, can they be deleted?
     list($test, $params) = $DB->get_in_or_equal($categoryids);
     $containedcourses = $DB->get_records_sql("SELECT id,1 FROM {course} c WHERE c.category {$test}", $params);
     $containscourses = false;
     if ($containedcourses) {
         $containscourses = true;
         foreach ($containedcourses as $courseid => $notused) {
             if ($candeletecontent && !can_delete_course($courseid)) {
                 $candeletecontent = false;
                 break;
             }
         }
     }
     /// Are there any questions in the question bank here?
     $containsquestions = question_context_has_any_questions($categorycontext);
     /// Get the list of categories we might be able to move to.
     $testcaps = array();
     if ($containscourses) {
         $testcaps[] = 'moodle/course:create';
     }
     if ($containscategories || $containsquestions) {
         $testcaps[] = 'moodle/category:manage';
     }
     $displaylist = array();
     $notused = array();
     if (!empty($testcaps)) {
         make_categories_list($displaylist, $notused, $testcaps, $category->id);
     }
     /// Now build the options.
     $options = array();
     if ($displaylist) {
         $options[0] = get_string('movecontentstoanothercategory');
     }
     if ($candeletecontent) {
         $options[1] = get_string('deleteallcannotundo');
     }
     /// Now build the form.
     $mform->addElement('header', 'general', get_string('categorycurrentcontents', '', format_string($category->name, true, array('context' => $categorycontext))));
     if ($containscourses || $containscategories || $containsquestions) {
         if (empty($options)) {
             print_error('youcannotdeletecategory', 'error', 'index.php', format_string($category->name, true, array('context' => $categorycontext)));
         }
         /// Describe the contents of this category.
         $contents = '<ul>';
         if ($containscategories) {
             $contents .= '<li>' . get_string('subcategories') . '</li>';
         }
         if ($containscourses) {
             $contents .= '<li>' . get_string('courses') . '</li>';
         }
         if ($containsquestions) {
             $contents .= '<li>' . get_string('questionsinthequestionbank') . '</li>';
         }
         $contents .= '</ul>';
         $mform->addElement('static', 'emptymessage', get_string('thiscategorycontains'), $contents);
         /// Give the options for what to do.
         $mform->addElement('select', 'fulldelete', get_string('whattodo'), $options);
         if (count($options) == 1) {
             $optionkeys = array_keys($options);
             $option = reset($optionkeys);
             $mform->hardFreeze('fulldelete');
             $mform->setConstant('fulldelete', $option);
         }
         if ($displaylist) {
             $mform->addElement('select', 'newparent', get_string('movecategorycontentto'), $displaylist);
             if (in_array($category->parent, $displaylist)) {
                 $mform->setDefault('newparent', $category->parent);
             }
             $mform->disabledIf('newparent', 'fulldelete', 'eq', '1');
         }
     } else {
         $mform->addElement('hidden', 'fulldelete', 1);
         $mform->setType('fulldelete', PARAM_INT);
         $mform->addElement('static', 'emptymessage', '', get_string('deletecategoryempty'));
     }
     $mform->addElement('hidden', 'delete');
     $mform->setType('delete', PARAM_ALPHANUM);
//.........这里部分代码省略.........

function print_courses($category)
{
    /// Category is 0 (for all courses) or an object
    global $CFG;
    if (!is_object($category) && $category == 0) {
        $categories = get_child_categories(0);
        // Parent = 0   ie top-level categories only
        if (is_array($categories) && count($categories) == 1) {
            $category = array_shift($categories);
            $courses = get_courses_wmanagers($category->id, 'c.sortorder ASC', array('password', 'summary', 'currency'));
        } else {
            $courses = get_courses_wmanagers('all', 'c.sortorder ASC', array('password', 'summary', 'currency'));
        }
        unset($categories);
    } else {
        $courses = get_courses_wmanagers($category->id, 'c.sortorder ASC', array('password', 'summary', 'currency'));
    }
    if ($courses) {
        echo '<ul class="unlist">';
        foreach ($courses as $course) {
            if ($course->visible == 1 || has_capability('moodle/course:viewhiddencourses', $course->context)) {
                echo '<li>';
                print_course($course);
                echo "</li>\n";
            }
        }
        echo "</ul>\n";
    } else {
        print_heading(get_string("nocoursesyet"));
        $context = get_context_instance(CONTEXT_SYSTEM);
        if (has_capability('moodle/course:create', $context)) {
            $options = array();
            $options['category'] = $category->id;
            echo '<div class="addcoursebutton">';
            print_single_button($CFG->wwwroot . '/course/edit.php', $options, get_string("addnewcourse"));
            echo '</div>';
        }
    }
}

                            <?php 
    $cat_id = $cat['cat_id'];
    ?>
                            <a href="<?php 
    echo base_url('category/?cat_id=' . $cat_id . '&per_page=');
    ?>
" class="cat" rel="<?php 
    echo $cat['cat_id'];
    ?>
"><?php 
    echo $cat['cat_title'];
    ?>
</a>
                            <ul class="dropdown">
                            <?php 
    $child_cats = get_child_categories($cat['cat_id']);
    if ($child_cats) {
        foreach ($child_cats as $child_cat) {
            $cat_id = $child_cat['cat_id'];
            ?>
                                    <li>
                                        <a href="<?php 
            echo base_url('category?cat_id=' . $cat_id . '&per_page=');
            ?>
"><?php 
            echo $child_cat['cat_title'];
            ?>
</a>
                                    </li>
                                <?php 
        }

function related_categories($cat_id)
{
    $child_cat = get_child_categories($cat_id);
    $related_html = '<ul class="treeMenu">';
    if ($child_cat) {
        foreach ($child_cat as $category) {
            $related_html .= '<li><span></span><a href="' . base_url("category?cat_id=" . $category['cat_id']) . '&per_page=">' . $category['cat_name'] . '</a><br clear="all" /></li>';
        }
    }
    $related_html .= '</ul>';
    return $related_html;
}

//search
if ($_GET['search']) {
	$_GET['search'] = trim($_GET['search']);
	$page_string .= SEP.'search='.urlencode($_GET['search']);
	$search = $addslashes($_GET['search']);
	$search = str_replace(array('%','_'), array('\%', '\_'), $search);
	$search = '%'.$search.'%';
	$search = "((LinkName LIKE '$search') OR (description LIKE '$search'))";
} else {
	$search = '1';
}

//view links of a child category
if ($_GET['cat_parent_id']) {
    $children = get_child_categories ($_GET['cat_parent_id'], $categories);
    $cat_sql = "C.cat_id IN ($children $_GET[cat_parent_id])";
	$parent_id = intval($_GET['cat_parent_id']);
} else {
    $cat_sql = '1';   
    $parent_id = 0;	
}

//get links
$tmp_groups = implode(',', $_SESSION['groups']);

if (!empty($tmp_groups)) {
	$sql = "SELECT * FROM ".TABLE_PREFIX."links L INNER JOIN ".TABLE_PREFIX."links_categories C USING (cat_id) WHERE ((owner_id=$_SESSION[course_id] AND owner_type=".LINK_CAT_COURSE.") OR (owner_id IN ($tmp_groups) AND owner_type=".LINK_CAT_GROUP.")) AND L.Approved=1 AND $search AND $cat_sql ORDER BY $col $order";
} else {
	$sql = "SELECT * FROM ".TABLE_PREFIX."links L INNER JOIN ".TABLE_PREFIX."links_categories C USING (cat_id) WHERE (owner_id=$_SESSION[course_id] AND owner_type=".LINK_CAT_COURSE.") AND L.Approved=1 AND $search AND $cat_sql ORDER BY $col $order";
}

function print_whole_category_list2($category = NULL, $displaylist = NULL, $parentslist = NULL, $depth = -1, $showcourses = true)
{
    global $CFG;
    // maxcategorydepth == 0 meant no limit
    if (!empty($CFG->maxcategorydepth) && $depth >= $CFG->maxcategorydepth) {
        return;
    }
    if (!$displaylist) {
        make_categories_list($displaylist, $parentslist);
    }
    if ($category) {
        if ($category->visible or has_capability('moodle/category:viewhiddencategories', get_context_instance(CONTEXT_SYSTEM))) {
            print_category_info2($category, $depth, $showcourses);
        } else {
            return;
            // Don't bother printing children of invisible categories
        }
    } else {
        $category->id = "0";
    }
    if ($categories = get_child_categories($category->id)) {
        // Print all the children recursively
        $countcats = count($categories);
        $count = 0;
        $first = true;
        $last = false;
        foreach ($categories as $cat) {
            $count++;
            if ($count == $countcats) {
                $last = true;
            }
            $up = $first ? false : true;
            $down = $last ? false : true;
            $first = false;
            print_whole_category_list2($cat, $displaylist, $parentslist, $depth + 1, $showcourses);
        }
    }
}

/**
 * Retrieve all dynamic files
 *
 * @return string[] The array of dynamic files
 */
function offline_get_dynamic_files()
{
    global $CFG, $COURSE, $USER, $DB;
    require_once $CFG->dirroot . '/course/lib.php';
    // Include homepage and accessible course pages
    $files = array('.', $CFG->wwwroot . '/', $CFG->wwwroot . '/index.php', $CFG->wwwroot . '/lib/offline/go_offline.js', $CFG->wwwroot . '/user/editadvanced.php?id=' . $USER->id);
    // get all accessible courses
    if (isloggedin() and !has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM)) and !isguest() and empty($CFG->disablemycourses)) {
        $courses = get_my_courses($USER->id, 'visible DESC,sortorder ASC', array('summary'));
    } else {
        if (!has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM)) and !isguest() or $DB->count_records('course') <= FRONTPAGECOURSELIMIT) {
            $categories = get_child_categories(0);
            if (is_array($categories) && count($categories) == 1) {
                $category = array_shift($categories);
                $courses = get_courses_wmanagers($category->id, 'c.sortorder ASC', array('password', 'summary', 'currency'));
            } else {
                $courses = get_courses_wmanagers('all', 'c.sortorder ASC', array('password', 'summary', 'currency'));
            }
            unset($categories);
        }
    }
    // make sure the course is visible and retrieve other modules and main course pages
    foreach ($courses as $course) {
        if ($course->visible == 1 || has_capability('moodle/course:viewhiddencourses', $course->context)) {
            $files[] = $CFG->wwwroot . '/course/view.php?id=' . $course->id;
            //Get all the module main pages
            foreach (get_list_of_plugins() as $module) {
                if ($module != 'label') {
                    $files[] = $CFG->wwwroot . '/mod/' . $module . '/index.php?id=' . $course->id;
                }
            }
            //Get all the relevant forums
            require_once $CFG->dirroot . '/mod/forum/lib.php';
            $forums = forum_get_readable_forums($USER->id, $course->id);
            foreach ($forums as $forum) {
                $files[] = $CFG->wwwroot . '/mod/forum/view.php?f=' . $forum->id;
            }
            $modinfo =& get_fast_modinfo($course);
            get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
            foreach ($mods as $mod) {
                if ($mod->modname == 'forum') {
                    $files[] = $CFG->wwwroot . '/mod/forum/view.php?id=' . $mod->id;
                    $cm = get_coursemodule_from_id('forum', $mod->id);
                    $discussions = forum_get_discussions($cm);
                    foreach ($discussions as $d) {
                        $files[] = $CFG->wwwroot . '/mod/forum/discuss.php?d=' . $d->discussion;
                    }
                }
            }
            //Get all the relevant assignments
            foreach ($modinfo->instances['assignment'] as $cm) {
                if (!$cm->uservisible) {
                    continue;
                }
                $files[] = $CFG->wwwroot . '/mod/assignment/view.php?id=' . $cm->id;
            }
        }
    }
    $files = str_replace('&amp;', '&', $files);
    return $files;
}